Abstract
This letter proposes a novel coordinated current and voltage unbalance mitigation approach for networked microgrids (MGs). First, numerous dispersed PV systems in each MG are assembled as two aggregated systems with different connections. Then, a multi-MG cooperative current unbalance mitigation (CUM) method is developed for the substation transformer (ST) and the simplified linear programming (LP)-based CUM formulas are derived. Later, a neighborhood-collaborative mechanism-based voltage control and voltage unbalance alleviation method is proposed for individual PV inverters and is seamlessly integrated with the proposed CUM method. Case studies on four networked MGs validate the effectiveness and superiority of the proposed approach compared with a benchmark approach.
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